[Edu-sig] Use of "badges" to encourage learning

[Andre Roberge]

There seems to be a trend on various websites to award users "badges" to
keep track of progress.  Other than the rationale that "everyone is doing
it this days so it must serve a purpose", do any of the edu-sig readers
have experience with using "badges" or similar tricks to encourage learning
when it comes to programming beginners?
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